▎ 摘　　要

NOVELTY - An anode active material (50) comprises core particles (60), a polymer coating (70) formed on a surface of the core particles, and conductive particles (80) formed on the polymer coating. The conductive particles have an average particle diameter greater than a thickness of the polymer coating. USE - Active material is used for forming anode for secondary battery (claimed) e.g. lithium secondary battery, nickel-cadmium battery or nickel-hydrogen battery, used as power source of mobile electronic device, such as camcorder, cellular phone and laptop computer. ADVANTAGE - The anode formed using the active material provides secondary battery having improved stability, high-temperature storage or high-temperature life characteristics and power/capacitance characteristics, reduced resistance, and suppressed swelling and expansion of the core particles by the polymer coating. Since the polymer coating is formed on the core particles, and conductive particles are formed on the polymer coating or in the polymer coating, side reactions and damage, such as cracks of the core particles providing anode activity can be prevented, thereby improving life stability of the battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a secondary battery, which comprises a cathode comprising a lithium metal oxide, and the anode comprising the anode active material, facing the cathode; and manufacture of the anode active material, which involves forming the polymer coating on the core particles by wet-coating, and performing dry surface treatment on the polymer coating with the conductive particles. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of the anode active material. 50Anode active material 60Core particles 70Polymer coating 80Conductive particles 125Anode current collector